54
F
LAME
S
ENSOR
(Q
UALIFIED
S
ERVICER
O
NLY
)
Under some conditions, the fuel or air supply can create a nearly
invisible coating on the flame sensor. This coating acts as an
insulator causing a drop in the flame sense signal. If the flame
sense signal drops too low the furnace will not sense flame and
will lock out. The flame sensor should be carefully cleaned by a
qualified servicer using emery cloth or steel wool. Following
cleaning, the flame sense signal should be as indicated in the
Specifications Sheet.
B
EFORE
L
EAVING
AN
I
NSTALLATION
•
Cycle the furnace with the thermostat at least three
times. Verify cooling and fan only operation.
•
Review the Owner’s Manual with the homeowner and
discuss proper furnace operation and maintenance.
•
Leave literature packet near furnace.
R
EPAIR
AND
R
EPLACEMENT
P
ARTS
•
When ordering any of the listed functional parts, be
sure to provide the furnace model, manufacturing, and
serial numbers with the order.
•
Although only functional parts are shown in the parts
list, all sheet metal parts, doors, etc. may be ordered
by description.
•
Parts are available from your distributor.
Functional Parts List-
Gas Valve
Blower Motor
Gas Manifold
Blower Wheel
Natural Gas Orifice
Blower Mounting Bracket
Propane Gas Orifice
Blower Cutoff
Igniter
Blower Housing
Flame Sensor
Inductor
Rollout Limit Switch
Heat Exchanger with
Primary Limit Switch
Recuperator Coil
Auxiliary Limit Switch
Coil Front Cover
Pressure Switch
Integrated Control Module
Induced Draft Blower
Transformer
Door Switch
